1314 results about "Polymer particle" patented technology

The invention relates to the technical field of battery materials, in particular to a diaphragm binder composition, diaphragm binder powder, a diaphragm and a battery. The separator binder composition comprises polymer particles A and polymer particles B, the glass transition temperature Tg of the polymer particles A is-10 DEG C or below, the glass transition temperature Tg of the polymer particles B is 60 DEG C or above, the average particle size D50 of the polymer particles A is 500 nm or above, and the average particle size D50 of the polymer particles B is 300 nm or below. The diaphragm binder composition provided by the invention not only can effectively bond a pole piece and a diaphragm, but also is helpful for maintaining the uniformity and stability of a coating on the surface of the diaphragm, ensures that the diaphragm has high air permeability and good wettability to an electrolyte, and is helpful for prolonging the cycle life of a battery.

The invention provides a preparation system and method of porous electrode carbon. The system mainly comprises a two-section temperature-variable carbonization fluidized bed and an activation fluidized bed. According to the method, small-particle-size polymer particles are softened in the carbonization process and bonded with a large number of heat carrier particles to form composite particles, so that self bonding and excessive growth are avoided, and controllable carbonization is achieved in the two-section temperature-changing carbonization fluidized bed; and introducing the composite particles into an activation fluidized bed, carrying out high-temperature activation, and removing the heat carrier to obtain the porous carbon electrode carbon particles. According to the method, adhesion of polymer particles during carbonization is avoided, the problem of instability of superfine particle fluidization operation is solved, the links of grinding and heating and cooling are reduced, and the method has the advantages of being low in cost and capable of being continuously operated.

To provide a production method of a novel crosslinked block copolymer capable of producing polymer particles of which the particles are hardly collapsed.SOLUTION: A production method of a crosslinked block copolymer contains obtaining a block copolymer from two or more kinds of polymerizable monomers (first polymerization) and obtaining a crosslinked block copolymer by adding one or more kinds of polymerizable monomers out of the two or more kinds of the polymerizable monomers and a poly functional monomer to the block copolymer (second polymerization). The second polymerization preferably contains crosslinking the block copolymers to each other.SELECTED DRAWING: None

The invention provides a diaphragm adhesive composition, a diaphragm and a lithium ion battery, the solid content of the diaphragm adhesive composition is 10-40wt%, and when the solid content of the diaphragm adhesive composition is diluted to 5wt%, the surface tension of a diluent is not less than 28mN / m; the diaphragm adhesive composition comprises polymer particles A and a polymer adhesive B, wherein the solid mass ratio of the polymer particles A to the polymer adhesive B is 100: (3-30); the particle size of the polymer particles A is 0.2-10 [mu] m, and the glass transition temperature of the polymer particles A is 30-90 DEG C; and the polymer adhesive B is a water-based emulsion type adhesive, the particle size of polymer particles contained in the polymer adhesive B is 0.1-1 mu m, and the glass transition temperature of the polymer adhesive B is-50-20 DEG C. The diaphragm adhesive composition disclosed by the invention is not easy to spread on a base material, can prevent an adhesive glue solution from being quickly diffused on the surface of a diaphragm, forms controllable, uniform-size and uniformly-distributed adhesive coating points on the surface of the base material, and has small influence on the air permeability of the diaphragm.

The invention relates to the technical field of lithium ion batteries, in particular to a polymer coating diaphragm and a secondary battery. The polymer coating is a double-block bottle brush polymer particle with a core-shell structure, and the polymer particle comprises a bottle brush-shaped core polymer and a shell polymer; the glass transition temperature of the core polymer is greater than or equal to 90 DEG C, and the glass transition temperature of the shell polymer is less than or equal to-10 DEG C. According to the diaphragm binder disclosed by the invention, the core layer has a relatively high glass transition temperature, and meanwhile, the introduced bottle brush polymer structure can further effectively reduce the thermal shrinkage of a diaphragm and enhance the heat resistance; the shell layer has a low glass transition temperature, the cohesiveness at room temperature is significantly improved, and the introduced bottle brush polymer structure has high stability. The ceramic diaphragm prepared by adopting the diaphragm binder disclosed by the invention has relatively low thermal shrinkage rate and relatively strong binding power with a negative pole piece.

A process is provided for transferring a product from a first polymerization zone (101) to a second polymerization zone (301) arranged in series with the first polymerization zone (101). The process comprises: discharging a product of the first polymerization zone (101) from the first polymerization zone (101); separating the product into a gas phase comprising any unreacted monomer and gaseous agent used in the first polymerization zone (101), and a solid phase comprising a polymerization product; and transferring the solid phase to the second polymerization zone (301) via at least one of a first transfer vessel (202) and a second transfer vessel (203) arranged in parallel to each other and in selective communication with each other, wherein the at least one of the first transfer vessel (202) and second transfer vessel (203) is further in selective communication with the second polymerization zone (301), and the second polymerization zone (301) is a gas-phase polymerization zone.

The invention relates to an epoxy core-shell polymer particle and resin, a preparation method of the epoxy core-shell polymer particle and resin and application of the epoxy core-shell polymer particle and resin to epoxy resin. The preparation method of the epoxy core-shell polymer particle comprises the following steps: heating and mixing a polybutadiene seed emulsion, a reducing agent, an emulsifier and the like; adding methyl methacrylate and an initiator, and glycidyl methacrylate and an initiator, and heating to react; compared with the prior art, the core-shell particle with the outer layer of the synthesized shell containing the epoxy group can be used for toughening the epoxy resin, so that the toughness of the epoxy resin is effectively improved while the excellent heat resistance and mechanical properties of the epoxy resin are maintained.

The invention provides a negative electrode plate. The negative electrode plate comprises a negative electrode current collector, a graphite negative electrode material layer positioned on the surface of the negative electrode current collector, and a mixed coating of graphite and polymer particles positioned on the surface of the graphite negative electrode material layer, the graphite negative electrode material layer comprises graphite, the mixed coating comprises graphite and polymer particles, and the average particle size D1 of the graphite in the graphite negative electrode material layer and the average particle size D3 of the polymer particles are both larger than the average particle size D2 of the graphite in the mixed coating. The glass transition temperature Tg of the polymer particles is 60 DEG C or below, the polymer modulus is 250-400 MPa, and the swelling degree in an electrolyte is 10-30%. The negative plate provided by the invention can form stable bonding with the diaphragm in the hot pressing process, and the bonding force is improved by more than one time; when the negative plate is applied to the lithium ion secondary battery, the cycle life of a battery cell can be effectively prolonged by more than 20%, and lithium is not separated out during charging.

The invention discloses a coated reflecting film based on an organic fluorescent coating and a preparation method of the coated reflecting film, tetra (4-aminophenyl) methane and tetra-(4-formyl-(1, 1-biphenyl)) ethylene are used as reaction monomers to prepare a novel topological structure [4 + 4] COF (3D-TPE-COF) with a tetraphenylethylene (TPE) unit, and the novel topological structure [4 + 4] COF (3D-TPE-COF) is used for preparing the reflective film based on the organic fluorescent coating. The covalent organic framework material 3D-TPE-COF is added into coating liquid as a fluorescent material to prepare a coating reflecting film based on an organic fluorescent coating, and the obtained reflecting film can convert high-energy blue light, so that the brightness of light emitted by a backlight module is higher and closer to white; meanwhile, the 3D-TPE-COF fluorescent material and the polymer particles can form hydrogen bonds in the coating liquid to avoid aggregation of the polymer particles, so that the wear resistance and scratch resistance of the coating reflecting film are improved.

The invention relates to a flame-retardant breakdown-resistant metallized film and a capacitor, the flame-retardant breakdown-resistant metallized film comprises an aluminum shell, a capacitor core and an epoxy resin layer for packaging the capacitor core, and the capacitor core is formed by winding and metal spraying the flame-retardant breakdown-resistant metallized film; and preparing a metal coating on the surface of the flame-retardant modified insulating film through a vacuum coating process. According to the flame-retardant breakdown-resistant thin-film capacitor, through a manufacturing process of modifying an existing insulating base film, adding a flame retardant into polymer particles, and then spraying a corona auxiliary liquid on the thin film to be matched with corona treatment, the defects that the hot shrinkage rate of the thin film is too large and the impact strength is low due to the addition of the flame retardant can be overcome; and finally, the flame retardance and the breakdown resistance of the thin film capacitor are remarkably improved.

The invention discloses an interface modification material with a high failure threshold, a solid electrolyte and an all-solid-state battery, and relates to the technical field of electrochemistry. The interface modification material comprises a lithium salt, polymer particles, nanometer indium oxide particles and nanometer NASICON type solid electrolyte powder, the solid electrolyte is obtained by modifying the NASICON type solid electrolyte through the interface modification material, and the all-solid-state battery can be prepared through the solid electrolyte. According to the interface modification material, the cycle performance of the all-solid-state battery at room temperature can be improved, and meanwhile, the interface critical failure threshold can be increased.

The present invention relates to a composition comprising an aqueous dispersion of biodegradable polymer particles, a method of preparing the composition, and a method of preparing a coated substrate comprising the composition. The composition is useful as a coating applied to a substrate, particularly a paper substrate. The coated paper is useful as a single layered barrier coated paper or paperboard.

A separator includes a porous substrate and a porous coating disposed on at least one surface of the porous substrate, the porous coating includes a polymer, and the polymer includes polymer particles. In a 130 μm×100 μm region on a surface of the porous coating, the number of the polymer particles with a maximum diameter in a range of 5 μm to 14 μm is 100 to 180. The separator has large-particle size polymer that can increase the interface gap at the corners of the electrochemical device. Thus, for the electrochemical device, the electrolyte at the corner interfaces can achieve good infiltration during the charge-discharge cycling process, effectively alleviating the corner purple / black spot problem of the electrochemical device.

Described herein are compositions, methods, and systems for printing metal three-dimensional objects. In an example, described is a method of printing a three-dimensional object comprising: (i) depositing a metal powder build material, wherein the metal powder build material has an average particle size of from about 10 μm to about 250 μm; (ii) selectively applying a binder fluid on at least a portion of the metal powder build material, wherein the binder fluid comprises an aqueous liquid vehicle and latex polymer particles dispersed in the aqueous liquid vehicle; (iii) heating the selectively applied binder fluid on the metal powder build material to a temperature of from about 40° C. to about 180° C.; and (iv) repeating (i), (ii), and (iii) at least one time to form the three-dimensional object.

The invention belongs to the technical field of battery diaphragms, and particularly relates to a preparation method of polymer glue for a diaphragm coating, the polymer glue, a diaphragm and a battery. The polymer glue comprises polymer particles, each polymer particle comprises a core and a shell, the core comprises a base core and an elastic structure, at least the surface of the base core is provided with holes, the elastic structure at least penetrates through the holes in the surface of the base core, the shell wraps the surface of the core, PDI of the polymer particles is smaller than 1, D50 ranges from 1 micrometer to 11 micrometers, and the glass transition temperature of the material of the base core is not smaller than 50 DEG C; the elastic modulus of the material of the elastic structure is 10-80 MPa, the material of the shell is hot-pressed under the conditions of 55 DEG C and 4 MPa, and the binding power to the pole piece is not less than 5 N / m. The polymer glue does not fill ceramic particles and diaphragm pores, the rate and cycle performance of the battery can be improved, and the ceramic coating prepared from the polymer glue can fully release stress and is not easy to fall off.

The invention discloses a high-dielectric composite material and a preparation method thereof, and belongs to the technical field of composite materials. The preparation method comprises the following steps: mixing and grinding dielectric ceramic powder and polymer particles at the temperature of-200 DEG C to-100 DEG C, so that the dielectric ceramic powder is coated on the surfaces of the polymer particles or dispersed among the polymer particles to obtain a pre-mixture; and carrying out hot pressing treatment on the pre-mixture to obtain the high-dielectric composite material with the isolation structure. According to the preparation method, the polymer-based composite material with the isolation structure is obtained through the preparation steps of combining low-temperature grinding and mixing with hot pressing, the dielectric ceramic powder is regularly and continuously enriched in a composite material matrix through the isolation structure, the dielectric constant of the composite material can be greatly improved, and the preparation method is simple in process, low in cost and free of pollution.

Membranes and related systems and methods for separation of components in liquids are generally described. The membrane may include particles in a polymer matrix (e.g., a polyamide layer). The particles may include metal-organic framework particles comprising functional groups (e.g., from post-synthetic modification) that can, in some instances, improve the rejection and / or selectivity of the membrane. For example, the metal-organic framework may comprise functional groups bound to hydrophobic groups (e.g., alkyl chains) that assist with suspension stability in nonpolar solvents during membrane fabrication. As another example, the metal-organic framework may comprise functional groups bound to crosslinking agents that facilitate in situ crosslinking of the particles with the polymer matrix, thereby reducing voids in the membrane and / or leaching. In some instances, the membrane is a thin-film nanocomposite membrane (e.g., for separating components like charged species and / or neutral species) formed via, for example, interfacial polymerization in the presence of the particles.

A shoe or other footwear has a non-removable multi-layer foot-support member (FSM) embedded within the sole. The uppermost layer is a breathable, stretchable textile configured for direct contact with the foot, offering softness and elasticity. Directly beneath it is a containment layer made of elastic fabric partially infused or impregnated with silicone, which stabilizes and restrains the granular contents below. The central layer includes one or two or three sealed chambers filled with a cured mixture of silicone and polymeric granules, forming a deformable medium that yields under pressure and mimics natural granular terrain or sand. Beneath this is a synthetic textile layer that restricts lateral expansion of the granular mixture, and preserves chamber geometry during use. The bottom component is a semi-rigid base that structurally supports and anchors all overlying layers.

A method of three-dimensional printing can include iteratively applying a polymer build material as individual layers to a powder bed, where the polymer build material includes from about 80 wt % to 100 wt % polymeric particles, and based on a three-dimensional object model, selectively applying a coalescing agent onto individual layers of the polymer build material. The coalescing agent can include an aqueous liquid vehicle and a coalescing solvent that depresses a melting point of the polymeric particles. The method can include exposing the powder bed to heat to selectively coalesce portions of individual layers of the polymer build material in contact with the coalescing solvent. The heat may not be sufficient to coalesce the polymer build material that is not in contact with the coalescing solvent and may be sufficient to fuse the polymeric particles in contact with the coalescing solvent together to form a three-dimensional object.

The present invention generally relates to the composition of particle gels for conformance control, well drilling and well treatments. More particularly, this invention relates to swellable polymer particle gels that can re-crosslink, i.e., reassociate and self-heal, at subterranean conditions. These particle gels can be deployed to improve the conformance of water flooding of especially matrix bypass events (MBEs), that are also known as void space conduits. Moreover, these particle gels can be deployed for controlling the water production and increasing of petroleum recovery. The inventive particles can also be deployed as diverter for well stimulation.

The invention relates to the technical field of batteries, in particular to a battery diaphragm, a preparation method thereof and a secondary battery. The battery diaphragm comprises a base membrane and a coating arranged on at least one side surface of the base membrane, the coating comprises non-fluorine polymer particles and silane coupling agent modified inorganic filler particles, and the surface density of the coating is 1.5-2.5 g / m < 2 >; the mass ratio of the non-fluorine polymer particles in the coating is 10%-25%; the non-fluorine polymer particles are secondary agglomerated particles formed by agglomerating primary particles, and the D50 particle size of the primary particles is 0.4-0.6 mu m; the secondary agglomerated particles meet the condition that (D90-D10) / D50 is less than 1.3; the glass transition temperature Tg of the secondary agglomerated particles is-5 to 5 DEG C. The battery diaphragm disclosed by the invention has excellent heat resistance and adhesion with a pole piece, and the secondary battery adopting the battery diaphragm disclosed by the invention has more excellent cycle performance.

The invention belongs to the technical field of secondary batteries, and particularly relates to a winding type battery and application thereof. The wound battery comprises a positive pole piece, a diaphragm and a negative pole piece which are wound in a laminated manner, and comprises a straight area and corner areas connected to two ends of the straight area, wherein in the corner region, the maximum distance between the adjacent positive pole piece and negative pole piece is A [mu] m; in the straight area, the maximum distance between the adjacent positive pole piece and negative pole piece is B [mu] m, and A-B is greater than or equal to 3 and less than or equal to 10; in addition, the diaphragm comprises a matrix and a polymer coating arranged on the surface of at least one side of the matrix, the compression ratio of the polymer coating is C, and C is larger than or equal to 40% and smaller than or equal to 70%; the polymer coating comprises polymer particles with the particle size Dv50 of 2-20 microns.

Disclosed are a battery separator and a battery. The battery separator includes a substrate, a first coating layer and a second coating layer, and the first coating layer and the second coating layer are arranged opposite to one another on two sides of the substrate; the first coating layer includes first polymer particles and inorganic particles; and the second coating layer includes second polymer particles; Dv10 of the first polymer particles is denoted as A, and Dv50 of the first polymer particles is denoted as B; Dv90 of the inorganic particles is denoted as C; and 0.2≤A / C≤5; and 1≤B / C≤40. The battery separator of the present disclosure adheres well to an electrode plate in a battery cell, giving the battery cell excellent low-temperature dynamic performance. Meanwhile, the battery containing the battery has excellent safety performance and cycling performance.

The present invention relates to a composition comprising an aqueous dispersion of biodegradable polymer particles, a method of preparing the composition, and a method of preparing a coated substrate comprising the composition. The composition is useful as a coating applied to a substrate, particularly a paper substrate. The coated paper is useful as a single layered barrier coated paper or paperboard.

The invention provides a non-fluoropolymer, a non-fluoropolymer composite diaphragm and application, the non-fluoropolymer comprises a polymer A and a polymer B at least partially coating the surface of the polymer A, the crosslinking degree of the polymer A is X1, the crosslinking degree of the polymer B is X2, 5% < = X1 < = 10%, and 50% < = X2 < = 60%; the non-fluorine polymer composite diaphragm comprises a base membrane and a coating layer coated on at least one side of the base membrane. The non-fluorine polymer particles have high swelling rate at high temperature and reversible characteristics of absorbing and releasing electrolyte, when the non-fluorine polymer and the non-fluorine polymer composite diaphragm are applied to a battery cell, when the battery cell is heated abnormally, the non-fluorine polymer swells at high speed and blocks an ion shuttle channel, further temperature deterioration is avoided, and the service life of the battery cell is prolonged. Meanwhile, when the temperature returns to normal, the non-fluorine polymer particles can recover to the original morphology and recover an ion shuttle channel, so that the subsequent cycle performance of the battery cell is not influenced.

The utility model relates to the technical field of batteries, and discloses a diaphragm of a battery cell, the battery cell and a battery pack. The separator includes a base film and a hybrid coating. The mixed coating is coated on a single surface or double surfaces of the base film; the mixed coating comprises a heat-resistant material and polymer particles, the particle size of the polymer particles is larger than that of the heat-resistant material, the polymer particles at least partially protrude out of the heat-resistant material to form supporting protrusions, and the supporting protrusions are suitable for forming a gap between the diaphragm and the pole piece after the diaphragm and the pole piece are laminated. According to the diaphragm of the battery cell provided by the utility model, the electrolyte infiltration effect of the pole piece can be improved. And meanwhile, the polymer particles have relatively strong electrolyte absorption performance, can absorb and store part of electrolyte, are beneficial to infiltration of a battery cell pole piece, and continuously release the electrolyte in the cycle process of the lithium battery cell for supplementing the electrolyte consumed by the pole piece, so that the cycle life of the battery cell is prolonged.

The invention discloses a polymer foamed sheet as well as a preparation method and application thereof, and relates to the technical field of foamed materials. According to the preparation method of the polymer foamed sheet provided by the invention, firstly, the polymer particles with specific morphology are mixed, hot pressed and sintered to obtain the sheet with certain porosity, and then the sheet is foamed and sintered to form pores in the sheet, so that diffusion of supercritical fluid is accelerated; according to the preparation method, rapid and efficient preparation of the polymer foamed board can be achieved, the obtained foamed polymer board has abundant foam holes with high uniformity in size and distribution, the foaming ratio can reach 8.3 times or above, the density is low, the light weight characteristic is excellent, the large-scale application prospect is achieved, meanwhile, the good heat insulation characteristic is achieved, and the application prospect is wide. The heat conductivity coefficient is not higher than 0.09 W m <-1 > K <-1 >.

An external additive for toner, wherein the external additive is an organosilicon polymer particle, and defining A (nm) as the number-average particle diameter of primary particles of the external additive measured using a scanning electron microscope, and defining B (nm) as the number-average particle diameter of the external additive measured in accordance with a centrifugal sedimentation method, the A and the B satisfy a following Expression (1):1.5≤B / A≤3.0  (1).

The invention discloses a diaphragm and a secondary battery, and belongs to the field of batteries. According to the diaphragm, a functional coating containing polymer particles with two sizes and glass transition temperatures as key components is arranged on an organic substrate, and meanwhile, the size gradient of the polymer particles and the porosity of the diaphragm are correspondingly adjusted; when the electrolyte is applied to a winding type secondary battery, ideal electrolyte absorption and retention effects can be realized, and meanwhile, the lithium precipitation condition at the corner bending part of the secondary battery can be effectively inhibited.